Title:
A voice to digital converter, a voice decoding device, a sound encoding method, and a voice decoding method
Document Type and Number:
Japanese Patent JP5986565
Kind Code:
B2
Abstract:
A voice coding device capable of preventing overall quality degradation even when the bit rate for coding is lowered. The voice coding device codes a wide band signal in a first layer, and codes an extended band signal whose frequency band is located in higher frequency than the wide band signal in an extended band layer. An adaptive band selection unit (301) selects a frequency band to be excluded from a coding object in the extended band layer or a frequency band whose energy is to be attenuated in the extended band layer. A band-limited signal generation unit (302) excludes, within the frequency band of an input signal, the frequency band selected by the adaptive band selection unit (301) from the coding object, or attenuates the energy of the frequency band selected by the adaptive band selection unit (301).
Inventors:
Oosuke Katsunori
Masahiro Oshikiri
Hiroyuki Ehara
Masahiro Oshikiri
Hiroyuki Ehara
Application Number:
JP2013519367A
Publication Date:
September 06, 2016
Filing Date:
May 25, 2012
Export Citation:
Assignee:
Panasonic Intellectual Property Corporation of America
International Classes:
G10L19/00; G10L19/02; G10L21/034; G10L21/0388
Domestic Patent References:
| JP2008107415A | ||||
| JP2004522198A | ||||
| JP2002169599A | ||||
| JP2010156990A | ||||
| JP7327014A | ||||
| JP9127987A | ||||
| JP2010224180A |
Attorney, Agent or Firm:
Koichi Washida